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Analog Devices Semiconductor Electronic Components Datasheet

ADG729 Datasheet

CMOS/ Low-Voltage/ 2-Wire Serially-Controlled/ Matrix Switches

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a
FEATURES
2-Wire Serial Interface
2.7 V to 5.5 V Single Supply
2.5 On Resistance
0.75 On-Resistance Flatness
100 pA Leakage Currents
Single 8-to-1 Matrix Switch ADG728
Dual 4-to-1 Matrix Switch ADG729
Power-On Reset
Small 16-Lead TSSOP Package
APPLICATIONS
Data Acquisition Systems
Communication Systems
Relay Replacement
Audio and Video Switching
Automatic Test Equipment
CMOS, Low-Voltage, 2-Wire
Serially-Controlled, Matrix Switches
ADG728 /ADG729
FUNCTIONAL BLOCK DIAGRAMS
ADG728
ADG729
S1 S1A
DA
S4A
D
S1B
DB
S8 S4B
INPUT SHIFT
REGISTER
RESET
SDA SCL A0 A1
INPUT SHIFT
REGISTER
SDA SCL A0 A1
GENERAL DESCRIPTION
The ADG728 and ADG729 are CMOS analog matrix switches
with a serially controlled 2-wire interface. The ADG728 is an
8-channel matrix switch, while the ADG729 is a dual 4-channel
matrix switch. On resistance is closely matched between switches
and very flat over the full signal range. These parts can operate
equally well as either multiplexers, demultiplexers or switch
arrays and the input signal range extends to the supplies.
The ADG728 and ADG729 utilize a 2-wire serial interface that
is compatible with the I2C™ interface standard. Both have two
external address pins (A0 and A1). This allows the 2 LSBs of
the 7-bit slave address to be set by the user. Four of each of the
devices can be connected to the one bus. The ADG728 also has
a RESET pin that should be tied high if not in use.
Each channel is controlled by one bit of an 8-bit word. This
means that these devices may be used in a number of different
configurations; all, any, or none of the channels may be on at
any one time.
On power-up of the device, all switches will be in the OFF con-
dition and the internal shift register will contain all zeros.
All channels exhibit break-before-make switching action pre-
venting momentary shorting when switching channels.
The ADG728 and ADG729 are available in 16-lead TSSOP
packages.
PRODUCT HIGHLIGHTS
1. 2-Wire Serial Interface.
2. Single Supply Operation. The ADG728 and ADG729 are
fully specified and guaranteed with 3 V and 5 V supply rails.
3. Low On Resistance 2.5 typical.
4. Any configuration of switches may be on at any one time.
5. Guaranteed Break-Before-Make Switching Action.
6. Small 16-Lead TSSOP Package.
I2C is a trademark of Philips Corporation.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000


Analog Devices Semiconductor Electronic Components Datasheet

ADG729 Datasheet

CMOS/ Low-Voltage/ 2-Wire Serially-Controlled/ Matrix Switches

No Preview Available !

ADG728/ADG729–SPECIFICATIONS1
(VDD = 5 V ؎ 10%, GND = 0 V, unless otherwise noted.)
Parameter
ANALOG SWITCH
Analog Signal Range
On Resistance (RON)
On-Resistance Match Between
Channels (RON)
On-Resistance Flatness (RFLAT(ON))
LEAKAGE CURRENTS
Source OFF Leakage IS (OFF)
Drain OFF Leakage ID (OFF)
Channel ON Leakage ID, IS (ON)
LOGIC INPUTS (A0, A1)2
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
IINL or IINH
CIN, Input Capacitance
LOGIC INPUTS (SCL, SDA)2
Input High Voltage, VINH
Input Low Voltage, VINL
IIN, Input Leakage Current
VHYST, Input Hysteresis
CIN, Input Capacitance
LOGIC OUTPUT (SDA)2
VOL, Output Low Voltage
DYNAMIC CHARACTERISTICS2
tON
tOFF
Break-Before-Make Time Delay, tD
Charge Injection
B Version
–40؇C
25؇C
to +85؇C
2.5
4.5
0.75
± 0.01
± 0.1
± 0.01
± 0.1
± 0.01
± 0.1
0.005
6
0.005
0.05 VDD
6
95
85
8
±3
0 V to VDD
5
0.4
0.8
1.2
± 0.3
±1
±1
2.4
0.8
± 0.1
0.7 VDD
VDD + 0.3
–0.3
0.3 VDD
± 1.0
0.4
0.6
140
130
1
Off Isolation
–55
–75
Channel-to-Channel Crosstalk
–55
–75
–3 dB Bandwidth
ADG728
ADG729
CS (OFF)
CD (OFF)
ADG728
ADG729
CD, CS (ON)
ADG728
ADG729
POWER REQUIREMENTS
IDD
65
100
13
85
42
96
48
10
NOTES
1Temperature range is as follows: B Version: –40°C to +85°C.
2Guaranteed by design, not subject to production test.
Specifications subject to change without notice.
20
Unit
V
typ
max
typ
max
typ
max
nA typ
nA max
nA typ
nA max
nA typ
nA max
V min
V max
µA typ
µA max
pF typ
V min
V max
V min
V max
µA typ
µA max
V min
pF typ
V max
V max
ns typ
ns max
ns typ
ns max
ns typ
ns min
pC typ
dB typ
dB typ
dB typ
dB typ
MHz typ
MHz typ
pF typ
pF typ
pF typ
pF typ
pF typ
µA typ
µA max
Test Conditions/Comments
VS = 0 V to VDD, IS = 10 mA;
Test Circuit 1
VS = 0 V to VDD, IS = 10 mA
VS = 0 V to VDD, IS = 10 mA
VDD = 5.5 V
VD = 4.5 V/1 V, VS = 1 V/4.5 V, Test Circuit 2
VD = 4.5 V/1 V, VD = 1 V/4.5 V, Test Circuit 3
VD = VS = 4.5 V/1 V, Test Circuit 4
VIN = 0 V to VDD
ISINK = 3 mA
ISINK = 6 mA
RL = 300 , CL = 35 pF, Test Circuit 5;
VS1 = 3 V
VS1 = 3 V, RL = 300 , CL = 35 pF;
Test Circuit 5
RL = 300 , CL = 35 pF;
VS1 = VS2 = 3 V, Test Circuit 5
VS = 2.5 V, RS = 0 , CL = 1 nF;
Test Circuit 6
RL = 50 , CL = 5 pF, f = 10 MHz;
RL = 50 , CL = 5 pF, f = 1 MHz;
Test Circuit 8
RL = 50 , CL = 5 pF, f = 10 MHz;
RL = 50 , CL = 5 pF, f = 1 MHz;
Test Circuit 7
RL = 50 , CL = 5 pF, Test Circuit 8
VDD = 5.5 V
Digital Inputs = 0 V or 5.5 V
–2– REV. 0


Part Number ADG729
Description CMOS/ Low-Voltage/ 2-Wire Serially-Controlled/ Matrix Switches
Maker Analog Devices
Total Page 12 Pages
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